add disableMousewheel option to docs
add touchend event

fixes #133

thanks @denishavranek
add ability to clear time

Enables timepicker to be reset with clear or setTime(null)

ex.
$('.timepicker').timepicker('setTime', null);

or

$('.timepicker').timepicker('clear');

fixes #155
make input fields more unique

fixes #145
uncomment some tests
add tests to reproduce #152
Merge branch 'gh-pages' of github.com:jdewit/bootstrap-timepicker into gh-pages